I have just finished going through a 1930 Revere model 602 hour strike clock. I am going to reuse the original power connector junction block, used between the 110 volt input and the field coil. It uses 4 set screws, 2 between the 110 volt supply and 2 for the field coil. The set screws hold each wire into the junction block. My question is, should the wire ends be soldered, or twisted and left bare? Thank you.